I'm kind of glad it's a bit harder but I don't want to make it that hard... Basically the purple laser is very hard to dodge(use parry [J]), it doesn't follow you like the other kinds but to help you out, the boss stays still for a second before shooting: bait the boss and keep on moving around.
Hope this helps!
Edit: forgot to mention that now you also have a parry time in the settings, you can have more or less parry time(which changes the score) but can help big time